Thank for the interest in the survey.
As I said before, this is not a final report. Therefore we do not intend to present all informations.
People interested in this can find out more by talking to us.
While I do not want to bore the reader with all the technical details, I will only say that the survey is carried out once a week,o
follow a fixed path at a more or less fixed time of the day, and count all birds seen/heard at all distance.
I am sure there are different opinions on the methodology, but since the method is sufficiently fixed/standardized,
I am satisfied that the method can give good comparison on relative bird abandunce of the sites from year to year.
There are a lot more information than those presented here. For example, I guess some of you may find the species composition
data interesting. That will certainly be discussed in the final report.
The horixontal axis of some graph shows a number up to 360 and slightly beyond. This is representing the day in a year by 1 to 365.
I hope this is not too difficult to understand.
Go back to the data, do any of you have the feeling that bird population in these sites has decreased in the last few years?
Or do you feel that it is the opposite? If you have your own data, that would be even better. Do you mind sharing that with us?
HF Cheung
